Such a weird history, that one.
Two of the committee resigned in protest, Kissinger almost turned it down because it was also being awarded to Lê Đức Thọ, Lê Đức Thọ actually turned it down because the peace it was supposed to be about hadn't happened yet, Kissinger accepted in absentia as he did not want to be targeted by anti-war protestors when getting the peace prize, then he later tried to return it only for the committee to say no.